Expandablelistview 简单使用

Expandablelistview是可展开的listview,通过点击一层title获取对应title下面的content，着重点是ExpandableListViewaAdapter里面各个方法的使用。ExpandableListViewaAdapter中包括父、子 listview的count、id、view等，因此理解好ExpandableListViewaAdapter了，就可以很好使用Expandablelistview了。

下面我把效果图以及源码贴下来供大家阅读：

首先是activity_main.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="demoone.yizooo.com.expandablelistviewdemo_02.MainActivity">    <ExpandableListView        android:id="@+id/expendlist"        android:layout_width="match_parent"        android:layout_height="wrap_content"></ExpandableListView></RelativeLayout>其次是expendlist_group.xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="horizontal"    android:background="#ffffff">    <!--扩展ListView的头List布局文件-->    <LinearLayout        android:layout_width="match_parent"        android:layout_height="45dp"        android:orientation="horizontal"        android:gravity="center_vertical">    <TextView        android:id="@+id/txt"        android:layout_width="0dp"        android:layout_height="wrap_content"        android:layout_weight="1"        android:text="title"        android:textSize="14sp"        android:textColor="#333333"        android:layout_marginLeft="10dp"/>    <ImageView        android:id="@+id/img"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/right"        android:layout_marginRight="10dp"/>    </LinearLayout></LinearLayout>其次是expendlist_item
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal"    android:background="#eeeeee" >    <!--扩展ListView的子List布局文件-->    <LinearLayout        android:layout_width="match_parent"        android:layout_height="45dp"        android:orientation="horizontal"        android:gravity="center_vertical">    <TextView        android:id="@+id/txt"        android:layout_width="0dp"        android:layout_height="wrap_content"        android:layout_weight="1"        android:textSize="13sp"        android:textColor="#333333"        android:text="Name"        android:layout_marginLeft="10dp"/>        <ImageView            android:id="@+id/img"            android:layout_width="20.0dp"            android:layout_height="20.0dp"            android:src="@drawable/duigou"            android:layout_marginRight="10dp"/>    </LinearLayout></LinearLayout>
最后是MainActivity
public class MainActivity extends Activity {    PRivate ExpandableListView expandableListView;    private List<String> group_list;//    private List<List<String>> item_list;    private List<List<Integer>> item_list2;    private HashMap<String, List<String>> map;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //title        group_list = new ArrayList<String>();        group_list.add("总经理");        group_list.add("监管");        group_list.add("财务");////        //item//        item_list = new ArrayList<List<String>>();//        item_list.add(group_list);//        item_list.add(group_list);//        item_list.add(group_list);        map = new HashMap<String, List<String>>();        List<String> list1 = new ArrayList<String>();        list1.add("Name_01");        map.put("总经理", list1);        List<String> list2 = new ArrayList<String>();        list2.add("Name_02");        map.put("监管", list2);        List<String> list3 = new ArrayList<String>();        list3.add("Name_03");        list3.add("Name_03");        list3.add("Name_03");        map.put("财务", list3);        List<Integer> tmp_list = new ArrayList<Integer>();        tmp_list.add(R.drawable.duigou);        tmp_list.add(R.drawable.duigou);        tmp_list.add(R.drawable.duigou);        item_list2 = new ArrayList<List<Integer>>();        item_list2.add(tmp_list);        item_list2.add(tmp_list);        item_list2.add(tmp_list);        expandableListView = (ExpandableListView) findViewById(R.id.expendlist);        //设置 属性 GroupIndicator 去掉默认向下的箭头        expandableListView.setGroupIndicator(null);        expandableListView.setAdapter(new MyExpandableListViewAdapter(this));    }    //用过ListView的人一定很熟悉，只不过这里是BaseExpandableListAdapter    class MyExpandableListViewAdapter extends BaseExpandableListAdapter {        private Context context;        public MyExpandableListViewAdapter(Context context) {            this.context = context;        }        @Override        public int getGroupCount() {            return group_list.size();        }        @Override        public int getChildrenCount(int groupPosition) {            //return item_list.get(groupPosition).size();            String key = group_list.get(groupPosition);            int size = map.get(key).size();            return size;        }        @Override        public Object getGroup(int groupPosition) {            return group_list.get(groupPosition);        }        @Override        public Object getChild(int groupPosition, int childPosition) {            //return item_list.get(groupPosition).get(childPosition);            return childPosition;        }        @Override        public long getGroupId(int groupPosition) {            return groupPosition;        }        @Override        public long getChildId(int groupPosition, int childPosition) {            return childPosition;        }        @Override        public boolean hasStableIds() {            return true;        }        @Override        public View getGroupView(int groupPosition, boolean isExpanded,                                 View convertView, ViewGroup parent) {            GroupHolder groupHolder = null;            if (convertView == null) {                convertView = (View) getLayoutInflater().from(context).inflate(R.layout.expendlist_group, null);                groupHolder = new GroupHolder();                groupHolder.txt = (TextView) convertView.findViewById(R.id.txt);                // groupHolder.img = (ImageView) convertView                // .findViewById(R.id.img);                convertView.setTag(groupHolder);            } else {                groupHolder = (GroupHolder) convertView.getTag();            }            groupHolder.txt.setText(group_list.get(groupPosition));            return convertView;        }        @Override        public View getChildView(int groupPosition, int childPosition,                                 boolean isLastChild, View convertView, ViewGroup parent) {            ItemHolder itemHolder = null;            if (convertView == null) {                convertView = (View) getLayoutInflater().from(context).inflate(R.layout.expendlist_item, null);                itemHolder = new ItemHolder();                itemHolder.txt = (TextView) convertView.findViewById(R.id.txt);                itemHolder.img = (ImageView) convertView.findViewById(R.id.img);                convertView.setTag(itemHolder);            } else {                itemHolder = (ItemHolder) convertView.getTag();            }            //itemHolder.txt.setText(item_list.get(groupPosition).get(childPosition));            String key = MainActivity.this.group_list.get(groupPosition);            itemHolder.txt.setText(map.get(key).get(childPosition));            itemHolder.img.setBackgroundResource(item_list2.get(groupPosition).get(                    childPosition));            return convertView;        }        @Override        public boolean isChildSelectable(int groupPosition, int childPosition) {            return true;        }    }    class GroupHolder {        public TextView txt;        public ImageView img;    }    class ItemHolder {        public ImageView img;        public TextView txt;    }}
最后附上源码下载：
http://download.csdn.net/detail/laurachen93/9748157